X-Git-Url: https://eleni.mutantstargoat.com/git/?p=winnie;a=blobdiff_plain;f=src%2Ffbdev%2Fgfx.cc;h=db579ffa0779abe6d34d428789c31d8cb5665d50;hp=2b1c32a6d3079570025b2204fb6073d1ab3219ac;hb=c4ab1fa2768863098306862047bdb1116bd62a24;hpb=50e3f6daf627d72a500b07f053cb34f713f0c650

diff --git a/src/fbdev/gfx.cc b/src/fbdev/gfx.cc
index 2b1c32a..db579ff 100644
--- a/src/fbdev/gfx.cc
+++ b/src/fbdev/gfx.cc
@@ -7,6 +7,7 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/time.h>
 #include <unistd.h>
 
 #include <linux/fb.h>
@@ -54,6 +55,16 @@ bool init_gfx()
 		return false;
 	}
 
+	fb_vblank vblank;
+	if(ioctl(dev_fd, FBIOGET_VBLANK, &vblank) == -1) {
+		fprintf(stderr, "FBIOGET_VBLANK error: %s\n", strerror(errno));
+	}
+	else {
+		printf("flags: %x\n", vblank.flags);
+		printf("count: %d\n", vblank.count);
+		printf("beam position: %d, %d\n", vblank.hcount, vblank.vcount);
+	}
+
 	return true;
 }
 
@@ -233,4 +244,19 @@ void gfx_update()
 {
 }
 
+void wait_vsync()
+{
+	unsigned long arg = 0;
+
+	timeval tvstart, tvend;
+	gettimeofday(&tvstart, 0);
+	
+	if(ioctl(dev_fd, FBIO_WAITFORVSYNC, &arg) == -1) {
+		printf("ioctl error %s\n", strerror(errno));
+	}
+
+	gettimeofday(&tvend, 0);
+	printf("%ld %ld\n", tvend.tv_sec - tvstart.tv_sec, tvend.tv_usec - tvstart.tv_usec);
+}
+
 #endif // WINNIE_FBDEV